Insulator



y 14, 1929' R. s. DRAKE ET AL 1,713,426

INSULATOR Filed March 19 1928 w I wnumw l I I if l i imnlllllllf Z 1 Travel? 1 01 a Patented May 14, 1929.

. UNITED STATES PATENT OFFICE.

RONALD S. DRAKE AND CHARLES S. DRAKE, OF PLACERVILLE, CALIFORNIA.

msunaron.

This invention relates to improvements in insulators. i

The principal object is to provide an insulator, which insulator will tightly grip the wire passed therethrough thereby eliminat-- ing the necessity of securing the wire'with a separate clip.

Another object is to provide an insulator which will eliminate the necessity of employing the oak pegs now commonly used to secure the regulation insulator to the cross arm.

Another object is to provide an insulator wherein a merechanging of the roller will accommodate for various sizes of wire.

A further object is to provide means whereby the wire may be moved back and forth thereby taking up the weave of the poles or action of the wind, but in case a break occurs that the insulator will grip the wire and retain it from dropping away from the i11'.

sulator.

A still further object is to produce an insulator which is more economical to install requiring less time to secure the wire thereto.

Other objects and advantages will be apparent during the course of the following description. i

In the accompanying drawings forming a part of this specification and in which like numerals are employed to desi nate like parts throughout the same,

Figure l is a side elevation of our improved insulator as the same would appear in use upon a cross arm, a fragmentary of which is shown, 6

Figure 2 is a cross section taken on the line 23 of Figure 1. looking in the direction of the arrow 2,

Figure 3 is a cross section taken on the line 2-3 of Figure 1 looking in the direction of the arrow 3,

Figure at is a vertical cross section taken on the line 4.4; of Figure 2,

Figure 5 is a cross section taken on the line 5-5 of Figure 1, v

Figure 6 is a bottom perspective View of the insulator key,

Figure 7 is a perspective view of the grooved roller, and

Figure 8 is a perspective view of the roller axle.

In ordinary insulators as employed on poles, is a glass or porcelain device which is secured to an oak peg, which peg is then inserted in a cross arm or other support for the wire. The wire carrying the current is attached to this insulator either by being wrapped around and then secured to the insulator by a separate piece of wire or clip, or it passes directly over the insulator and is secured thereto by a separate wire.

Applicants have found that they can eliminate the labor incident to securingv a wire to an insulator and at the same time can provide an insulator which will serve all purposes required of an insulator and further will main tain the wire in the insulator should the wire become broken at a point remote from the insulator.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of our invention, the numeral 5 designates a portion of a cross arm. The numeral 6 designates the body of our insulator which is provided with a drip ring '7 and a shoulder 8, which shoulder contacts the top, of the cross arm. The lower portion 9 extends through the cross arm and is adapted to be secured thereto as by a washer 11 and cotter pin 12. The body portion 6 has a slot 13 extending therethrough, the lower portion of which slot is provided with a recess 14 within which an eccentrically mounted grooved wheel 16 is rotatably positioned upon an axle 17. The upper portion of this grooved wheel is in close proximity to a shoulder 18, which shoulder extends entirely through the insulator and com-- inunicates with the slot 13. A pin 19 is formed upon the axle 17 and serves to lock the axle within the insulator in a manner which is well known. At 21 we have shown cap which carries a key which key is adapted to enter the slot 13 and is provided with a cutaway portion 23 which straddles the shaft 17. An offset 24 prevents side movement of the cap. The key 22 further naintains the grooved wheel 16 in the position shown in Figured. A groove 26 is provided in the upper portion of the grooved wheel 16 so as to receive the wire 27 therein.

The manner of employing our device is as follows Assuming that the insulator has been attached to a cross arm, the cover 21 together with the key 22 and offset 24 is removed after which the grooved wheel 16 may be moved to one side so as to bring the groove 26 in line with the slot 13. The wire 27 may now be laid in the slot 13 so as to come to rest in the groove 26 after which the wire and wheel are moved 'ba'ck'into the position shown in Figure 4 at Which time the Wire Will lie beneath the shoulder 18 Whichwill prevent the Wire from moving out of the slot 26. The cap is now replaced with the result that the key 22 will prevent the grooved Wheel from leaving its position With the result that should the Wire break at a point on either side of the insulator the movement of the Wire in the grooved heel Wlll tend to rotate the same and as the grooved Wheel is eccentrically mounted, a gripping action will immediately take place between the Wheel and the shoulder 18.

It Will thus be seen that We have produced a device which Will perform all the objects vabove set forth.

It is to be understood that the form of our invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size; shape and arrangement of parts a. stem, a body portion formed on said stem,

a slot formed through said body portion, an axle carriedin said body portlon a grooved Wheel eccentrically posltioned on said axle and adapted to lie to one side of said slot, said slot having a lateral extension defininga shoulder extending through said insulator and overlying said eccentrically positioned wheel and a cover for said insulator, said cover carrying a key extending into said slot and straddling said axle.

In testimony whereof We afiix our signatures. v V p RONALD S. DRAKE.

" CHARLES DRAKE. 

